I guess that would be a matter of opinion. They may have thought that it's not immediately clear how to pronounce Danone ("dan OWN"? "dah NUN"?) and decided to go with something more phonetic in English. It's perfectly clear, this way, that it's meant to rhyme with cannon. To my ears, it connotes strength and vitality; that is some tough yogurt! Contrast that with their primary competitor, Yoplait, which sounds foofy and pretty and French. :-P